diff --git a/configure.ac b/configure.ac
index 5e4da0231e3ed1b2f41283ca8382cf2489d0bc6e..c1f7102e1453682dd2f75fc451c228be857f06a0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -126,7 +126,7 @@ if test "x${LKT_DEBUG_ENABLED}" = "xyes"; then
 else
     BASEFLAGS+=" -O3"
 fi
-CFLAGS="${BASEFLAGS} -std=c18"
+CFLAGS="${BASEFLAGS} -std=c11"
 
 ##########
 # OUTPUT #